CN208386500U - A kind of dead-band regulator and its dead-zone circuit - Google Patents
A kind of dead-band regulator and its dead-zone circuit Download PDFInfo
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- CN208386500U CN208386500U CN201821080319.XU CN201821080319U CN208386500U CN 208386500 U CN208386500 U CN 208386500U CN 201821080319 U CN201821080319 U CN 201821080319U CN 208386500 U CN208386500 U CN 208386500U
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- resistance
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- differential amplifier
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Abstract
The utility model discloses a kind of dead-band regulator and its dead-zone circuits, comprising: the first differential amplifier circuit, for exporting the first linearized amplified signal；Second differential amplifier circuit, for exporting the second linearized amplified signal；First voltage comparator, non-inverting input terminal are used for input voltage input signal for inputting the second DC voltage, inverting input terminal；Second voltage comparator, non-inverting input terminal are used for input voltage input signal for inputting the first DC voltage, inverting input terminal；Four select a switch, first input end is connect with the output end of the first differential amplifier circuit, second input terminal and third input end grounding, 4th input terminal is connect with the output end of the second differential amplifier circuit, first gating controlled end is connect with the output end of first voltage comparator, and the second gating controlled end is connect with the output end of second voltage comparator.The dead-band regulator and its dead-zone circuit of the utility model have faster response speed, and can obtain accurate and stable dead zone.
Description
Technical field
The utility model relates to automation process control technology field more particularly to a kind of dead-band regulator and its dead zones
Circuit.
Background technique
Dead-zone circuit is the nonlinear amplification circuit for having dead zone, its main feature is that when input signal is located at setting range
When, the output signal of dead-zone circuit is always 0；When input signal exceeds the setting range, the output signal of dead-zone circuit is
Input signal is followed to change；Wherein, output signal is always that the range of input signal corresponding to 0 is known as the dead of the dead-zone circuit
Area.
In analog computing circuit and Process Control System, dead-zone circuit has been widely used in dead-band regulator,
Play the role of in dead-band regulator vital.Traditional dead-zone circuit mainly use operational amplifier, diode and
Resistor network is constituted, by selecting the on or off of diode to realize Dead Zone, still, because of diode and non-ideal
Switch element, when diode current flow, need to overcome threshold voltage；When diode ends, and there are leakage currents；Also, two poles
Pipe is easily influenced by ambient temperature and unstable, thus, there are response speed is relatively low for traditional dead-zone circuit, it is difficult to obtain quasi-
The problem of true and stable dead zone.
Utility model content
In view of the above-mentioned problems, a kind of dead-band regulator and its dead-zone circuit of the utility model have faster response speed
Degree, and accurate and stable dead zone can be obtained.
In order to solve the above technical problems, a kind of dead-zone circuit of the utility model, comprising:
First differential amplifier circuit, has first input end, the second input terminal and output end, and the first input end is used for
The first DC voltage is inputted, second input terminal is used for input voltage input signal, and the output end is for exporting First Line
Property amplified signal；
Second differential amplifier circuit has first input end, the second input terminal and output end, the second differential amplification electricity
The first input end on road is for inputting the second DC voltage, and the second input terminal of second differential amplifier circuit is for inputting institute
Voltage input signal is stated, the output end of second differential amplifier circuit is for exporting the second linearized amplified signal；
First voltage comparator, non-inverting input terminal is for inputting second DC voltage, and inverting input terminal is for inputting
The voltage input signal；
Second voltage comparator, non-inverting input terminal is for inputting first DC voltage, and inverting input terminal is for inputting
The voltage input signal；
Four select a switch, have first input end, the second input terminal, third input terminal, the 4th input terminal, first gating by
End, the second gating controlled end and output end are controlled, described four select the first input end and first differential amplifier circuit of a switch
Output end connection, described four select the second input terminal of a switch and described four select the third input end grounding of a switch, described
Four select the 4th input terminal of a switch to connect with the output end of second differential amplifier circuit, it is described first gating controlled end with
The output end of the first voltage comparator connects, the output end of the second gating controlled end and the second voltage comparator
Connection.
As an improvement of the above scheme, the dead-zone circuit, further includes:
Voltage follower, non-inverting input terminal select the output end of a switch to connect with described four, inverting input terminal and output end
Connection.
As an improvement of the above scheme, first differential amplifier circuit include: the first operational amplifier, first resistor,
Second resistance, 3rd resistor and the 4th resistance；Wherein,
First input end of the one end of the first resistor as first differential amplifier circuit, for inputting described
The one of the inverting input terminal of one DC voltage, the other end of the first resistor and the first operational amplifier and the second resistance
End is connected, and the other end of the second resistance is connect with the output end of first operational amplifier；
Second input terminal of the one end of the 3rd resistor as first differential amplifier circuit, for inputting the electricity
Press input signal, the non-inverting input terminal and the 4th resistance of the other end of the 3rd resistor and first operational amplifier
One end be connected, the other end of the 4th circuit ground connection.
As an improvement of the above scheme, the resistance value of the first resistor is equal with the resistance value of the 3rd resistor；Institute
The resistance value for stating second resistance is equal with the resistance value of the 4th resistance.
As an improvement of the above scheme, second differential amplifier circuit include: second operational amplifier, the 5th resistance,
6th resistance, the 7th resistance and the 8th resistance；Wherein,
First input end of the one end of 5th resistance as second differential amplifier circuit, for inputting described
Two DC voltages, the one of the other end of the 5th resistance and the inverting input terminal of second operational amplifier and the 6th resistance
End is connected, and the other end of the 6th resistance is connect with the output end of the second operational amplifier；
Second input terminal of the one end of 7th resistance as second differential amplifier circuit, for inputting the electricity
Press input signal, the other end of the 7th resistance and the non-inverting input terminal of the second operational amplifier and the 8th resistance
One end be connected, the other end of the 8th resistance ground connection.
As an improvement of the above scheme, the resistance value etc. of the resistance value of the 5th resistance and the 7th resistance；It is described
The resistance value of 6th resistance is equal with the resistance value of the 8th resistance.
As an improvement of the above scheme, the voltage value of the voltage value of first DC voltage and second DC voltage
It is equal in magnitude, and the polarity of first DC voltage is opposite with the polarity of second DC voltage.
In order to solve the above technical problems, the utility model also provides a kind of dead-band regulator, comprising: any one of the above
Dead-zone circuit.
Compared with prior art, in the dead-band regulator and its dead-zone circuit of the utility model first voltage comparator and
Second voltage comparator controls four according to input voltage signal and selects the corresponding first differential amplifier circuit output of a switching gate
Or second differential amplifier circuit output or one of ground using the output signal as a kind of dead-zone circuit so that the dead-zone circuit has
Faster response speed, avoids the use of diode in traditional scheme, and the device as used by the utility model all has
Higher stability, and not vulnerable to the influence of environment temperature, so that the dead-band regulator and its dead-zone circuit of the utility model
Accurate and stable dead zone can be obtained.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of dead-zone circuit of the utility model embodiment 1.
Fig. 2 is a kind of structural schematic diagram of dead-zone circuit of the utility model embodiment 2.
Fig. 3 is the signal transmission characteristics figure of dead-zone circuit in the utility model embodiment.
Specific embodiment
Many details are explained in the following description in order to fully understand the utility model.But this is practical new
Type can be implemented with the other modes for being much different from this description, and those skilled in the art can be without prejudice to the utility model
Similar popularization is done in the case where intension, therefore the utility model is not limited by the specific embodiments disclosed below.
Clear, complete description is carried out to the technical solution of the utility model with attached drawing combined with specific embodiments below.
Embodiment 1
As shown in Figure 1, being a kind of dead-zone circuit of the utility model embodiment 1.
The dead-zone circuit includes: the first differential amplifier circuit 1, has first input end, the second input terminal and output end, the
One input terminal is used for input voltage input signal U for inputting the first DC voltage-E, the second input terminali, output end U1For defeated
First linearized amplified signal out；Second differential amplifier circuit 2 has first input end, the second input terminal and output end, and first is defeated
Enter end and is used for input voltage input signal U for inputting the second DC voltage+E, the second input terminali, output end U2For exporting the
Bilinear amplified signal；First voltage comparator A3, non-inverting input terminal is for inputting the second DC voltage+E, inverting input terminal use
In input voltage input signal Ui；Second voltage comparator A4, for non-inverting input terminal for inputting the first DC voltage-E, reverse phase is defeated
Enter end and is used for input voltage input signal Ui；Four select a switch 3, the output end U of first input end and the first differential amplifier circuit 11
Connection, the second input terminal and third input end grounding, the output end U of the 4th input terminal and the second differential amplifier circuit 22Connection,
First gating controlled end A and first voltage comparator A3Output end U3Connection, the second gating controlled end B is compared with second voltage
Device A4Output end U4Connection, four select the output end Y of a switch 3 for a kind of output end of dead-zone circuit.
Next, being illustrated in conjunction with attached drawing 1 and attached drawing 3 to the course of work of the utility model embodiment 1.
Work as UiWhen <-E, first voltage comparator A3Output end U3With second voltage comparator A4Output end U4Export
High level, i.e. control four select the first of a switch 3 to gate the gating of controlled end A and second controlled end B and connect high level, then four select one to open
It closes 3 control first input ends to connect with output end Y, at this point, Y-U1Conducting, four select the output end Y of a switch 3 to export First Line
Property amplified signal；
As-E≤UiWhen≤+ E, first voltage comparator A3Output end U3Export high level, second voltage comparator A4's
Output end U4Low level is exported, that is, controls four and the first gating controlled end A of a switch 3 is selected to connect high level, the second gating controlled end B
Low level is connect, then four a switch 3 the second input terminal of control is selected to connect with output end Y, at this point, Y-ground conducting, four select a switch 3
Output end Y output voltage be 0；
Work as UiWhen >+E, first voltage comparator A3Output end U3With second voltage comparator A4Output end U4Export
Low level, i.e. control four select the first of a switch 3 to gate the gating of controlled end A and second controlled end B and connect low level, then four select one
Switch 3 controls the 4th input terminal and connect with output end Y, at this point, Y-U2Conducting, four select the output end Y of a switch 3 to export second
Linearized amplified signal.
Specifically, as shown in Figure 1, first differential amplifier circuit 1 includes: the first operational amplifier A1, first resistor R1、
Second resistance R2, 3rd resistor R3With the 4th resistance R4；Wherein, the R of first resistor1One end is as the first differential amplifier circuit
First input end, for inputting the first DC voltage-E, first resistor R1The other end and the first operational amplifier A1Reverse phase it is defeated
Enter end and second resistance R2One end be connected, second resistance R2The other end and the first operational amplifier A1Output end U1Connection；
3rd resistor R3Second input terminal of the one end as the first differential amplifier circuit, be used for input voltage input signal Ui, third electricity
Hinder R3The other end and the first operational amplifier A1Non-inverting input terminal and the 4th resistance R4One end be connected, the 4th resistance R4's
Other end ground connection.
Second differential amplifier circuit 2 includes: second operational amplifier A2, the 5th resistance R5, the 6th resistance R6, the 7th resistance
R7With the 8th resistance R8；Wherein, the 5th resistance R5First input end of the one end as the second differential amplifier circuit, for inputting
Second DC voltage+E, the 5th resistance R5The other end and second operational amplifier A2Inverting input terminal and the 6th resistance R6's
One end is connected, the 6th resistance R6The other end and second operational amplifier A2Output end U2Connection；7th resistance R7One end make
For the second input terminal of the second differential amplifier circuit, it to be used for input voltage input signal Ui, the 7th resistance R7The other end and second
Operational amplifier A2Non-inverting input terminal and the 8th resistance R8One end be connected, the 8th resistance R8The other end ground connection.
Preferably, R1=R3=R5=R7=R, R2=R4=R6=R8=RF, then in the first differential amplifier circuit 1 first fortune
Calculate amplifier A1Output end U1First linearized amplified signal U of outputO1ForSecond differential amplifier circuit 2
Middle second operational amplifier A2Output end U2Export the second linearized amplified signal UO2ForWherein, First Line
Property amplified signal UO1With the second linearized amplified signal UO2Slope K having the same, K=RF/R。
Preferably, the voltage value of the first DC voltage-E and the voltage value of the second DC voltage+E are equal in magnitude, and first
The polarity of DC voltage-E and the polarity of the second DC voltage+E are on the contrary, the voltage value and second voltage of first voltage signal-E are believed
The voltage value of number+E is equal in magnitude and the contrary dead zone section convenient for setting dead-zone circuit.
Embodiment 2
As shown in Fig. 2, being another dead-zone circuit of the utility model.
The dead-zone circuit is other than comprising whole components in embodiment 1, further includes: voltage follower A5, the voltage
Follower A5Non-inverting input terminal select the output end Y of a switch 3 to connect with four, inverting input terminal and output end UOConnection, so that through
Four select the output end Y of a switch 3 to export the first linearized amplified signal UO1Or the second linearized amplified signal UO2Or 0, it can be through voltage
Follower A5Output end UOOutput, realizes the isolation of output signal, improves the stability of output signal.
In conclusion as depicted in figs. 1 and 2, as input voltage signal UiSatisfaction-E≤UiWhen≤+ E, dead-zone circuit work
In dead zone section, the output end U of dead-zone circuitOOutput voltage be UOut=0；Work as UiWhen <-E, dead-zone circuit works linear
Amplification region, the output end U of dead-zone circuitOOutput voltage beWork as UiWhen >+E, dead-zone circuit work exists
Linear amplification region, the output end U of dead-zone circuitOOutput voltage be
Further, the utility model also provides a kind of dead-band regulator, comprising: any one of the above dead-zone circuit.
Compared with prior art, the dead-band regulator and its dead-zone circuit of the utility model, has the advantages that
(1) first voltage comparator and second voltage comparator control four according to input voltage signal and select a switching gate
Corresponding first differential amplifier circuit output or one of the output of the second differential amplifier circuit or ground, and then as a kind of dead-zone circuit
Output signal so that the dead-zone circuit have faster response speed, avoid the use of diode in traditional scheme；Due to
Device used by the utility model all has higher stability, and not vulnerable to the influence of environment temperature, so that this is practical new
The dead-band regulator and its dead-zone circuit of type can obtain accurate and stable dead zone；
(2) linear regulator and its dead-zone circuit can be by being arranged resistance R and RFPrecision exist to improve dead-zone circuit
The precision of the output signal of linear amplification region；
(3) by selecting the output end of a switch to connect voltage follower four, the anti-interference ability of circuit can be improved；
(4) linear regulator and its dead-zone circuit also have circuit structure simple, good linearity, at low cost, are to adjusting
The small feature of system non-linear effects.
The above descriptions are merely preferred embodiments of the present invention, not does in any form to the utility model
Limitation, therefore all contents without departing from technical solutions of the utility model are implemented according to the technical essence of the utility model to above
Any simple modification, equivalent change and modification that example is done, are still within the scope of the technical solutions of the present invention.
Claims (8)
1. a kind of dead-zone circuit characterized by comprising
First differential amplifier circuit has first input end, the second input terminal and output end, and the first input end is for inputting
First DC voltage, second input terminal are used for input voltage input signal, and the output end is linearly put for exporting first
Big signal；
Second differential amplifier circuit has first input end, the second input terminal and output end, second differential amplifier circuit
First input end is for inputting the second DC voltage, and the second input terminal of second differential amplifier circuit is for inputting the electricity
Input signal is pressed, the output end of second differential amplifier circuit is for exporting the second linearized amplified signal；
First voltage comparator, for non-inverting input terminal for inputting second DC voltage, inverting input terminal is described for inputting
Voltage input signal；
Second voltage comparator, for non-inverting input terminal for inputting first DC voltage, inverting input terminal is described for inputting
Voltage input signal；
Four select a switch, have first input end, the second input terminal, third input terminal, the 4th input terminal, the first gating controlled
End, the second gating controlled end and output end, described four select the first input end of a switch and first differential amplifier circuit
Output end connection, described four select the second input terminal of a switch and described four select the third input end grounding of a switch, and described four
The 4th input terminal of a switch is selected to connect with the output end of second differential amplifier circuit, the first gating controlled end and institute
State the output end connection of first voltage comparator, the output end company of the second gating controlled end and the second voltage comparator
It connects.
2. dead-zone circuit as described in claim 1, which is characterized in that further include:
Voltage follower, non-inverting input terminal select the output end of a switch to connect with described four, and inverting input terminal is connect with output end.
3. dead-zone circuit as described in claim 1, which is characterized in that first differential amplifier circuit includes: the first operation
Amplifier, first resistor, second resistance, 3rd resistor and the 4th resistance；Wherein,
First input end of the one end of the first resistor as first differential amplifier circuit is straight for inputting described first
Galvanic electricity pressure, the other end of the first resistor and the inverting input terminal of the first operational amplifier and one end phase of the second resistance
Even, the other end of the second resistance is connect with the output end of first operational amplifier；
Second input terminal of the one end of the 3rd resistor as first differential amplifier circuit, it is defeated for inputting the voltage
Enter signal, the one of the non-inverting input terminal and the 4th resistance of the other end of the 3rd resistor and first operational amplifier
End is connected, the other end ground connection of the 4th resistance.
4. dead-zone circuit as claimed in claim 3, which is characterized in that the resistance value of the first resistor and the 3rd resistor
Resistance value it is equal；The resistance value of the second resistance is equal with the resistance value of the 4th resistance.
5. dead-zone circuit as described in claim 1, which is characterized in that second differential amplifier circuit includes: the second operation
Amplifier, the 5th resistance, the 6th resistance, the 7th resistance and the 8th resistance；Wherein,
First input end of the one end of 5th resistance as second differential amplifier circuit is straight for inputting described second
Galvanic electricity pressure, one end phase of the other end of the 5th resistance and the inverting input terminal of second operational amplifier and the 6th resistance
Even, the other end of the 6th resistance is connect with the output end of the second operational amplifier；
Second input terminal of the one end of 7th resistance as second differential amplifier circuit, it is defeated for inputting the voltage
Enter the one of signal, the other end of the 7th resistance and the non-inverting input terminal of the second operational amplifier and the 8th resistance
End is connected, the other end ground connection of the 8th resistance.
6. dead-zone circuit as claimed in claim 5, which is characterized in that the resistance value of the 5th resistance and the 7th resistance
Resistance value it is equal；The resistance value of 6th resistance is equal with the resistance value of the 8th resistance.
7. dead-zone circuit as described in claim 1, which is characterized in that the voltage value of first DC voltage and described second
The voltage value of DC voltage is equal in magnitude, and the polarity phase of the polarity of first DC voltage and second DC voltage
Instead.
8. a kind of dead-band regulator characterized by comprising such as dead-zone circuit according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821080319.XU CN208386500U (en) | 2018-07-09 | 2018-07-09 | A kind of dead-band regulator and its dead-zone circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821080319.XU CN208386500U (en) | 2018-07-09 | 2018-07-09 | A kind of dead-band regulator and its dead-zone circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208386500U true CN208386500U (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821080319.XU Expired - Fee Related CN208386500U (en) | 2018-07-09 | 2018-07-09 | A kind of dead-band regulator and its dead-zone circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768311A (en) * | 2018-07-09 | 2018-11-06 | 佛山科学技术学院 | A kind of dead-band regulator and its dead-zone circuit |
-
2018
- 2018-07-09 CN CN201821080319.XU patent/CN208386500U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768311A (en) * | 2018-07-09 | 2018-11-06 | 佛山科学技术学院 | A kind of dead-band regulator and its dead-zone circuit |
| CN108768311B (en) * | 2018-07-09 | 2023-08-25 | 佛山科学技术学院 | Nonlinear regulator and dead zone circuit thereof |
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